The National Institute of Justice has evaluated school-based interventions that focus on reducing exclusion, commonly known as suspension and expulsion. The interventions described in this article tend to target students between four and eighteen in non-specialized schools. Interventions may target individual students or teachers, or they may target the whole school.
Components of the programs were varied. Components included enhancement of academic skills, after-school programs, mentoring/monitoring programs, building social skills, training for teachers, violence reduction efforts, and counseling, among others.
Interventions were delivered on school premises, or were supported by the school with at least one component being delivered in the school setting. The programs varied in length, and usually ranged from 12 to 14 weeks.
Students in the treatment group who received the intervention experienced a statistically-significant reduction in school exclusion compared with the control group. For more information about the programs, you can view the article after this link on the NIJ website.